Blower device for cleaning tubes.



H. ZEITL BLOWER DEVICE FOR QLEAMNG wBEs.

APPLICATION mic uov13o, 1914.

Patented May 16, 1916.

bf i M/l NA 2 1 71 Ill- Q E k Wflwsscs 5 %Ja4mm1 UNITED STATES PATENTQFFICE.

HERMANN ZEITZ, 0F HAMBURG, GERMANY, ASSIGNOR T0 SCHMIDTSCHE HEISSDAMPF-GESELLSCHAFT M. B. H., O]? CASSEL-WILHELMSHfiHE, GERMANY, A CORPORATIONOF GERMANY.

BLOWER DEVICE FOR CLEANING TUBES.

Specification h Letters Patent.

Patented May 16, 1916.

Application filed November 30, 1914. Serial No. 374,940.

To all whom it may concern:

Be it known that I, HERMANN Znrrz, a subject of the Emperor of Germany,resid ing at Hamburg, Germany have invented certain new and usefulImprovements in Blower Devices for Cleaning Tubes, of which thefollowing is a specification.

My invention relates to blower devibes for removing soot, ashes, and thelike from boiler tubes and particularly to those of the type in whichthe distance of the nozzle orifice from the tube plate can be varied insuch a manner that the jet serving as the cleaning agent passes over thetube ends in a spiral path. r-

My invention resides in certain details of.

construction as willhe more particularly set forth in the descriptionand claims which follow. The object of my invention is to make devicesof the character specified more eificient as well as more convenient andcertain in operation.

My invention will be better understood by referring to the drawingsin.which Figures 1 and 2 show vertical sections.

through blower in the inoperative/and operative positions respectively,and Fig. 3 a modification of a spindle with two nozzle orifices.

The blower constructed according to the present invention (me Figs. 1and 2) comprises a casingb arranged in fluid-tight relation to the tubea and having a flange 6 by means of-which it may be secured by screwbolts to the appropriate wall of the boiler. The casing b is furtherprovided with a branchb, through which steam is supplied and with acover 1 t9 which an internally threaded boss 9 is connected by the armsf.' The casing?) with its cover f and boss gserves' to receive and guidea spindle d the rear end of which is threaded to correspond with thethreads-of the boss g. The spindle d is solid in the neighborhood of itsthreaded portion but for the remainder of its length is hollow and isprovided near its rear end of the hollow portion, with a col-- spondingsurface f (see Fig. '2) provided on the cover f. Behind the collar 03the r ed, if two or more orifices, such hollow spindle is prmided with afew holes :12 which allow the steam or other fiuid used for cleaning thetubes to pass from the casing 5 into the interior of the hollow portionof the spindle (Z except when the collar d is in the position shown inFig. 1.

Stuihng boxes h and are provided in the cover f and casing .71respectively to prevent leakage from the casing along the spindle.- Thegland of the stufling box 6 is secured in position by a ring 0' which isscrewed or otherwise adjustably insertedin the 03' 1g. At its front end,the spindle d is provided with a cap in which is protected by the tube(1. when the spindle is withdrawn to its inoperative position. If thespindle d is rotated from this position, it advances and the cap ornozzle Ir: projects from the tube a'while simuitaneously communicationbetween the interior 0 the casing and the hollow portion of the spindled is established so that the fluid serving for cleaning purposes" canenter the spindle through the holes a) and escape through the orifice k.t 1

The cap la is provided either with asingle orifice as in Figs. 1 and 2,or with a 111- rality of orifices, preferably two, In an [02, as in Fig.3, arrangedat different anglesto the axis of the spindle d. Theilongerthe path traversed by the jet issuingfrom the tral axis of thespindle, d, 'during the begin- 1 ning of the forward movement of thedle, kl, those tubes less remote being nextja f; fected as the spindleis fed forward. until finally when the spindle is fed forward to itsfull extent, the steam jet will strike those tubes in the immediateneighborhood'of, the axis of the spindled produced.

' If only one orifice k is provided in the cap k, the travel of thespindle d must approximately correspond'to the distance between thefront and rear walls of the combustion'chamber since the orifice k is{hrranged at such an angle thatQthe jet'i'of steam issuing from itstrikes the outermost smoke tubes at the beginning of the forwardmovement of the spindle d. The travel-i the spindle,'however, can beconsideiiib ic are arranged at different angles to the axis of thespindle, and the entire group of smoke tubes concerned can then becleaned. in a shorter time,

If the blower is used for a single-ended smoke-tube boiler it may beinserted in tube passing from the rear plate of the boiler Lo the rearwall of the combustion chamber, w l? in the case of a (.lOlllJikkllflEilboiler (see 5} the blower n1 Ye attachcrl lo one of the smoke tubeselves; in both ca. the tube in which the blower is inscrtei; isarranged in the center of the group of smoke tubes concerned.

A blower according to the present invention considerable advantagescompared with those herelofore proposed. T hns in. comparison with priorblowers ing a. fixed the present inve tion is simpler in constructionand mor ily ooeratecl while ember orifice better atlapierl for thepurpose in quesL-ion, liloreover, as compared w ith blowers ha viiig amovable casing, the pre ent invention dislinguisheil by its r, l llil.low spin are '5 of L :5; provided u only one orifice provided with twoor more such orifices inclined at different air glee so thelongiiurlinal of the spindle, the fiuicl strikes the tubes underextremely favorable conditions unrl a very effective action insured.

ln the above description it has been as sumerl the; sieani is used asthe pressure medium anal this in general will be m at convomml; ii:lmwrier, obvious that any other suitable gaseous pr re medium, such forinstancews compressed air, may be employed if tlesirerl,

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, l declarethat, what 1 claim is:

l, In a blower device for cleaning tubes, in combination, a hollowspindle having a nozzle orifice at one end thereof and a se rate inletaperture, a collar upon said s3, dle adjacent to the inlet aperture uponthe side toward the nozzle orifice, a fixed casing having walls whichare spaced from and C011 stitute astearn tight closure about the saidinlet aperture and in which casing the spindle may be axially moved,sci-Ll casing being also provided with a seat agains which lbeaforesaidcollar may be aborted thereby closing said inletaperture, and an inletfor said casing adapted to be connected with a source of steam supply.

In a blower device forcleaning tubes in combination *ith a stationarycasing having an inlet for the cleaning liquid to be supplied, of aspindle movably mounted in the casing and passing therethrough at bothor I said spindle being hollow at its forward einl and having itsrearward end screw threaded, a threaded boss on the casing enging withthe il'u'eadecl end of the spindle, of an inlet port in said spindle, ofa collar arranged around said inlet port, a correspondingly formedportion in the casing against which the aforenamecl collar abuts therebyclosing the inlet port, when the spindle is in its rearmost position,and a discharging orifice at the forward end of the spindle.

3. In a blower device for cleaning tubes in combination with astationary casing having an inletfor the cleaning liquid to be supplied,of a spindle movably mounted in the casing and passing therethrough atboth ends, said spindle being hollow on its forward end and having itsrear end screw llirearled, a threaded boss on the casing eugaging with'Ehe threaded end the spindle,

sleaze-tight joints on each end of the oasing, of means for actuatingsaid spindle, of an inlet portin said spindle, of a collar arrangedaround said inletport, a correspondingly formed portion in the casingagainst which the afore-named collar abuts, thereby closing the inletport when the spindle is in its real-most position, and a dischargingnozale on the forward end of the spindle.

l. In a blower device for cleaning tubes in combination with astationary casing havan inlet for the cleaning liquid to be supplied, ofa spindle movably mounted in the casing and passing therethrough at bothernis, said ,spindle being hollow on its f0rward end and having itsrearward end screw threaded, a threaded boss on the casing en gagingwith the threaded end of the spindle, of steam-tight joints on each endof the casing, of means for actuating said spindle, of an inlet port insaid spinrlle, of a collar arruugcrl around said inlci port, a corresponlingly 'l'orinecl porrion in lhe casing against which the afore-namedcollar abuts, thereby closing the inletport when the spindle is in itsrearmost position, and of a plurality of orifices inclined at(lill'crcnt angles to the longitudinal axis of the spindle.

HERMANN ZEITZ.

